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以8个不同基因型烤烟为试验材料,用Li-6400便携式光合仪在自然光下测定其净光合速率、气孔导度、胞间CO2浓度、蒸腾速率、叶温等指标以研究不同品种(品系)烤烟叶片的光合特性。结果表明,品系‘09011’(Q6)净光合速率最高,品种‘NC71’(Q2)和‘红花大金元’(Q8)次之,品种‘K326’(Q1)、‘云烟203’(Q3)、‘NC102’(Q5)居中;‘云烟317’(Q4)和‘云烟105’(Q7)净光合速率较低。所测烤烟植株叶片的净光合速率层间差异达到极显著水平,上部>中部>下部;胞间CO2浓度层间也达到极显著水平;气孔导度、蒸腾速率、叶温层间差异不显著。
Eight different genotypes of flue-cured tobacco were used as experimental materials. The net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, transpiration rate and leaf temperature were measured under natural light with Li-6400 portable photosynthesis system to study the effects of different varieties (lines) Photosynthetic Characteristics of Flue - cured Tobacco Leaves. The results showed that the net photosynthetic rate of strain ’09011’ (Q6) was the highest, followed by ’NC71’ (Q2) and ’Qudanaka’ (Q8), and varieties ’K326’ ) And ’NC102’ (Q5). The net photosynthetic rate of Q4 and Q7 was lower. The differences of net photosynthetic rate in the leaves of tested tobacco plants reached the extremely significant level, with the top> middle> bottom; the intercellular CO2 concentration reached the extremely significant level; and the stomatal conductance, transpiration rate and leaf temperature were not significantly different.